Flange separation device

Abstract

The application discloses a flange separating device, which comprises a bolt and a nut, a fixed clamp is arranged on the nut, the fixed clamp is clamped on a first flange, the nut is in butt joint with a screw hole of the first flange, the first flange is connected to a second flange, an iron plate is arranged between the first flange and the second flange, the bolt passes through the nut and abuts against the iron plate, and the bolt is rotated to separate the first flange from the second flange. The flange separating device provided by the application is matched with the bolt and the nut, the bolt is twisted, the bolt passes through one end of the nut and abuts against the iron plate, the fixed clamp fixes the nut on the first flange, the bolt separates the first flange from the second flange by using reaction force, force is applied to a gasket in a gap between the first flange and the second flange, and a new gasket is replaced. The device can separate flanges with large gaps, does not generate maintenance cost, and can flexibly set a flange separating device suitable for a working stroke of a working pressure on a site to adapt to various construction conditions.

Description

Technical Field

[0001] This invention belongs to the field of special tools for marine equipment, and particularly relates to a flange separation device. Background Technology

[0002] In marine engineering, if the bolts are not tightened in one go during the flange connection process of subsea pipelines, the flange gasket needs to be replaced before tightening again in order to ensure the sealing between the flanges. Currently, a hydraulic flange separator is used to separate the flanges.

[0003] The high procurement and maintenance costs of hydraulic flange separators, coupled with their low utilization rate, increase the cost of subsea pipeline construction. The large size of hydraulic flange separators requires multiple personnel for handling and results in long transportation times, impacting offshore construction progress and further increasing construction costs.

[0004] Therefore, there is an urgent need to design a flange separation device to solve the flange separation problem mentioned above. Summary of the Invention

[0005] To address the technical problem mentioned in the background art—high procurement and maintenance costs and low utilization rate of hydraulic flange separators, which increases the cost of subsea pipeline construction—a flange separation device is provided to solve the flange separation problem. To achieve the above objectives, the specific technical solution of the flange separation device of the present invention is as follows:

[0006] A flange separation device includes a bolt and a nut. The nut has a retaining clip that snaps onto a first flange. The nut mates with the bolt hole of the first flange. The first flange is connected to a second flange. An iron plate is provided between the first flange and the second flange. The bolt passes through the nut and abuts against the iron plate. Rotating the bolt separates the first flange from the second flange.

[0007] Furthermore, the nut includes a first nut and a second nut, and fixing clips are symmetrically welded onto the first nut and the second nut respectively.

[0008] Furthermore, the fixing clip includes a first fixing clip and a second fixing clip. The first fixing clip is symmetrically welded to the first nut, and the second fixing clip is symmetrically welded to the second nut. The first fixing clip and the second fixing clip are respectively snapped onto the first flange so that the first nut and the second nut are coaxially arranged with the first screw hole and the second screw hole of the first flange, respectively.

[0009] Furthermore, the bolts include a first bolt and a second bolt. A third nut is welded to one end of the first bolt. Rotating the third nut causes the first bolt to be rotatably mounted on the first nut. A fourth nut is welded to one end of the second bolt. Rotating the fourth nut causes the second bolt to be rotatably mounted on the second nut.

[0010] Furthermore, the end of the first bolt away from the third nut is inserted into the first nut and exits through the first screw hole, and the end of the second bolt away from the fourth nut is inserted into the second nut and exits through the second screw hole.

[0011] Furthermore, the iron plate includes a first iron plate and a second iron plate, which respectively abut against the second flange.

[0012] Furthermore, the first bolt passes through the first screw hole and abuts against the first iron plate, and the second bolt passes through the second screw hole and abuts against the second iron plate. Rotating the first bolt and the second bolt separates the first flange from the second flange.

[0013] Furthermore, both the first and second fixing clips are U-shaped, with one end of the first and second fixing clips welded to the first and second nuts respectively, and the ends away from the first and second nuts respectively snapped onto the first flange.

[0014] Furthermore, the first iron plate and the second iron plate respectively abut against the third and fourth bolt holes of the second flange.

[0015] Furthermore, the first nut and the second nut are symmetrically abutted against the first threaded hole and the second threaded hole of the first flange by the first fixing clip and the second fixing clip, respectively. The flange separation device of the present invention has the following advantages:

[0016] By using bolts and nuts, tightening the bolts allows one end of the bolt to pass through the nut and abut against the iron plate. The fixing clip secures the nut to the first flange. The bolt's reaction force separates the first and second flanges. Further force is applied to remove the gasket from the gap between the first and second flanges, completing the gasket replacement. This device can separate flanges with large gaps, has low raw material costs, incurs no maintenance costs, and can be flexibly configured with a working stroke suitable for the on-site operating pressure to adapt to various construction situations. Attached Figure Description Figure 1 This is a perspective view of the flange separation device of the present invention; Figure 2 This is a perspective view of the connection between the first nut and the first fixing clip in the flange separation device of the present invention;

[0017] Figure 3 This is a perspective view of the connection between the first bolt and the third nut in the flange separation device of the present invention. Explanation of markings in the diagram:

[0018] 1. First flange; 2. Second flange; 3. First nut; 4. Second nut; 5. First fixing clip; 6. Second fixing clip; 7. First bolt; 8. Second bolt; 9. Third nut; 10. Fourth nut; 11. First iron plate; 12. Second iron plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 3 The flange separation device of the present invention is described.

[0022] like Figure 1 As shown, the flange separation device of this invention includes a bolt and a nut. The nut has a retaining clip that engages with the first flange. The nut aligns with the bolt hole of the first flange 1. The first flange 1 is connected to the second flange 2. An iron plate is positioned between the first flange 1 and the second flange 2. The bolt passes through the nut and abuts against the iron plate. Rotating the bolt separates the first flange 1 from the second flange 2. By tightening the bolt and nut, one end of the bolt passes through the nut and abuts against the iron plate. The retaining clip secures the nut to the first flange 1. The bolt uses its reaction force to separate the first flange 1 and the second flange 2. Applying force allows the gasket within the gap between the first flange 1 and the second flange 2 to be removed, completing the replacement of the gasket. This device can separate flanges with large gaps, has low raw material costs, incurs no maintenance costs, and allows for flexible configuration of the flange separation device with an operating stroke suitable for on-site operating pressure, adapting to various construction situations.

[0023] Furthermore, such as Figure 1 and Figure 2As shown, the nuts include a first nut 3 and a second nut 4, with fixing clips symmetrically welded onto both the first nut 3 and the second nut 4. The fixing clips include a first fixing clip 5 and a second fixing clip 6. The first fixing clip 5 is symmetrically welded onto the first nut 3, and the second fixing clip 6 is symmetrically welded onto the second nut 4. The first fixing clips 5 and 6 are respectively engaged with the first flange 1, so that the first nut 3 and the second nut 4 are coaxially aligned with the first and second threaded holes of the first flange 1, respectively. In this embodiment, the first nut 3 and the second nut 4 are the same size. The first fixing clip 5 is symmetrically welded to both ends of the first nut 3, and the second fixing clip 6 is symmetrically welded to both ends of the second nut 4. Preferably, the first fixing clip 5 and the second fixing clip 6 are the same size and are integrally formed by welding iron rods or casting with a mold. The first fixing clip 5 and the second fixing clip 6 respectively engage the first nut 3 and the second nut 4 with the end face of the first flange 1. Both the nuts and the fixing clips are readily available and inexpensive.

[0024] In the initial state, the first flange 1 and the second flange 2 are connected by multiple screws. Remove two screws connecting the first flange 1 and the second flange 2. Preferably, remove any two screws so that the first nut 3 and the second nut 4 are respectively engaged in the first screw hole and the second screw hole. The first nut 3 is coaxial with the first screw hole, and the second nut 4 is coaxial with the second screw hole. The engagement and hole alignment step is completed.

[0025] Furthermore, such as Figure 1 and Figure 3 As shown, the bolts include a first bolt 7 and a second bolt 8. A third nut 9 is welded to one end of the first bolt 7. Rotating the third nut 9 causes the first bolt 7 to be rotatably mounted on the first nut 3. A fourth nut 10 is welded to one end of the second bolt 8. Rotating the fourth nut 10 causes the second bolt 8 to be rotatably mounted on the second nut 4. The end of the first bolt 7 away from the third nut 9 passes through the first nut 3 and exits through the first threaded hole. The end of the second bolt 8 away from the fourth nut 10 passes through the second nut 4 and exits through the second threaded hole. In this embodiment, the first bolt 7 and the second bolt 8 have the same shape and size. One end of the first bolt 7 is screwed into the third nut 9, and the third nut 9 is welded to the end of the first bolt 7. One end of the second bolt 8 is screwed into the fourth nut 10, and the fourth nut 10 is welded to the end of the second bolt 8.

[0026] The first bolt 7, with its end away from the third nut 9, is screwed into the first nut 3. The second bolt 8, with its end away from the fourth nut 10, is screwed into the second nut 4. Preferably, a ratchet wrench or hydraulic wrench is used to apply flexible force to the third nut 9 and the fourth nut 10 welded to the ends of the first bolt 7 and the second bolt 8, so that the first bolt 7 is rotatably mounted on the first nut 3, and the second bolt 8 is rotatably mounted on the second nut 4. The end of the first bolt 7 screwed into the first nut 3 passes through the first threaded hole of the first flange 1, and the end of the second bolt 8 screwed into the second nut 4 passes through the second threaded hole of the first flange 1. The work of screwing the first bolt 7 and the second bolt 8 into the first flange 1 and the second flange 2 is completed.

[0027] Furthermore, such as Figure 1 As shown, the iron plate includes a first iron plate 11 and a second iron plate 12, which respectively abut against the second flange 2. A first bolt 7 passes through a first threaded hole and abuts against the first iron plate 11, and a second bolt 8 passes through a second threaded hole and abuts against the second iron plate 12. Rotating the first bolt 7 and the second bolt 8 separates the first flange 1 from the second flange 2. In this embodiment, the first iron plate 11 and the second iron plate 12 are the same iron plate, both abut against the second flange 2, with the first iron plate 11 located below the first threaded hole and the second iron plate 12 located below the second threaded hole.

[0028] Rotate the third nut 9 and fourth nut 10 welded to the ends of the first bolt 7 and second bolt 8 using a ratchet wrench or hydraulic wrench. The first bolt 7 and second bolt 8 rotate downwards along the first and second threaded holes, causing one end of the first bolt 7 to abut against the first iron plate 11, and one end of the second bolt 8 to abut against the second iron plate 12. Continue rotating the third nut 9 and fourth nut 10, causing the first bolt 7 and second bolt 8 to apply a reaction force to the first nut 3 and second nut 4. This causes the first nut 3 and second nut 4, which are engaged with the first flange 1, to move the first flange 1 away from the second flange 2, creating a gap between the first flange 1 and the second flange 2. Continue rotating the first bolt 7 and second bolt 8 until the gap between the first flange 1 and the second flange 2 allows for the removal and replacement of the internal gasket. This device is suitable for various construction situations and can be used underwater or on land.

[0029] Furthermore, such as Figure 1As shown, both the first fixing clip 5 and the second fixing clip 6 are U-shaped. One end of the first fixing clip 5 and the second fixing clip 6 are welded to the first nut 3 and the second nut 4, respectively, and the ends away from the first nut 3 and the second nut 4 are respectively snapped onto the first flange 1. The first iron plate 11 and the second iron plate 12 abut against the third and fourth screw holes of the second flange 2, respectively. The first nut 3 and the second nut 4 abut against the first screw hole and the second screw hole of the first flange 1, respectively, through the first fixing clip 5 and the second fixing clip 6. In this embodiment, the first fixing clip 5 and the second fixing clip 6 are both U-shaped, which allows them to be directly snapped onto the first flange 1. The U-shaped holes of the first fixing clip 5 and the second fixing clip 6 match the thickness of the first flange 1, and the first fixing clip 5 and the second fixing clip 6 are stably snapped onto the first flange 1, so that the first nut 3 and the second nut 4 are stably set on the first screw hole and the second screw hole of the first flange 1.

[0030] The first iron plate 11 and the second iron plate 12 respectively abut against the third and fourth threaded holes of the second flange 2, so that the first bolt 7 and the second bolt 8 do not protrude from the third and fourth threaded holes of the second flange 2. This allows the first bolt 7 and the second bolt 8 to exert a reaction force on the first nut 3 and the second nut 4 fastened to the first flange 1, thereby separating the first flange 1 and the second flange 2. The first nut 3 and the second nut 4 respectively abut against the first threaded hole and the second threaded hole of the first flange 1. Preferably, the first threaded hole and the second threaded hole are symmetrical along the axis of the first flange 1, applying a synchronous rotational force to the first bolt 7 and the second bolt 8. During the process of moving the first flange 1 away from the second flange 2, the first flange 1 and the second flange 2 remain parallel, thereby separating the first flange 1 and the second flange 2. The gaskets in the first flange 1 and the second flange 2 are then removed and replaced. Operating steps for the flange separation device in this application:

[0031] First, remove the screws that are symmetrically screwed onto the first flange 1 and the second flange 2, leaving the first flange 1 with the first screw hole and the second screw hole, and the second flange 2 with the third screw hole and the fourth screw hole. Then, attach the first nut 3, which has the first fixing clip 5 welded to both ends, and the second nut 4, which has the second fixing clip 6 welded to both ends, to the first flange 1 through the first fixing clip 5 and the second fixing clip 6, so that the first nut 3 is coaxial with the first screw hole and the second nut 4 is coaxial with the second screw hole.

[0032] Furthermore, a third nut 9 is screwed to one end of the first bolt 7 and welded to the first bolt 7, and a fourth nut 10 is screwed to one end of the second bolt 8 and welded to the second bolt 8. A ratchet wrench or a hydraulic wrench is used to apply force flexibly to the third nut 9 and the fourth nut 10 at the ends of the first bolt 7 and the second bolt 8, so that the first bolt 7 and the second bolt 8 are rotated and set on the first nut 3 and the second nut 4, and pass through the first threaded hole and the second threaded hole.

[0033] Finally, the first bolt 7 and the second bolt 8 abut against the first iron plate 11 and the second iron plate 12 on the second flange 2, respectively. The third nut 9 and the fourth nut 10 at the ends of the first bolt 7 and the second bolt 8 are then flexibly tightened using a ratchet wrench or a hydraulic wrench, so that the first bolt 7 and the second bolt 8 exert a reaction force on the first nut 3 and the second nut 4, causing the first flange 1 to move away from the second flange 2 in parallel, forming a gap. The gasket between the first flange 1 and the second flange 2 is then removed and replaced.

[0034] Based on the flange separation device, this invention uses a first bolt 7 and a second bolt 8 to engage with a first nut 3 and a second nut 4, respectively. Tightening the first bolt 7 and the second bolt 8 causes them to pass through one end of the first nut 3 and the second nut 4, respectively, and abut against the first iron plate 11 and the second iron plate 12. A first fixing clip 5 and a second fixing clip 6 fix the first nut 3 and the second nut 4 to the first flange 1. The first bolt 7 and the second bolt 8 use reaction force to separate the first flange 1 and the second flange 2. Applying force allows the gasket within the flange gap to be removed, completing the replacement of the new gasket. This device can separate flanges with large gaps, has low raw material costs, incurs no maintenance costs, and can be flexibly configured with a working stroke suitable for the on-site operating pressure to adapt to various construction situations.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A flange separation device, characterized in that, It includes bolts and nuts, with a retaining clip on the nut. The retaining clip is attached to the first flange, and the nut mates with the bolt hole of the first flange. The first flange is connected to the second flange, and an iron plate is provided between the first flange and the second flange. The bolt passes through the nut and abuts against the iron plate. Rotating the bolt separates the first flange from the second flange. The nuts include a first nut and a second nut, and fixing clips are symmetrically welded onto the first nut and the second nut respectively; The fixing clip includes a first fixing clip and a second fixing clip. The first fixing clip is symmetrically welded to the first nut, and the second fixing clip is symmetrically welded to the second nut. The first fixing clip and the second fixing clip are respectively snapped onto the first flange so that the first nut and the second nut are respectively coaxially set with the first screw hole and the second screw hole of the first flange. The bolts include a first bolt and a second bolt. A third nut is welded to one end of the first bolt. Rotating the third nut causes the first bolt to rotate and be mounted on the first nut. A fourth nut is welded to one end of the second bolt. Rotating the fourth nut causes the second bolt to rotate and be mounted on the second nut. The iron plate includes a first iron plate and a second iron plate, which respectively abut against the second flange; Both the first and second fixing clips are U-shaped. One end of the first and second fixing clips is welded to the first nut and the second nut, respectively, and the other end away from the first nut and the second nut is respectively clipped onto the first flange. The first nut and the second nut are symmetrically abutted against the first threaded hole and the second threaded hole of the first flange by the first fixing clip and the second fixing clip, respectively.

2. The flange separation device according to claim 1, characterized in that, The first bolt, with its end furthest from the third nut, is inserted into the first nut and exits through the first screw hole. The second bolt, with its end furthest from the fourth nut, is inserted into the second nut and exits through the second screw hole.

3. The flange separation device according to claim 1, characterized in that, The first bolt passes through the first screw hole and abuts against the first iron plate at one end. The second bolt passes through the second screw hole and abuts against the second iron plate at one end. Rotating the first bolt and the second bolt separates the first flange from the second flange.

4. The flange separation device according to claim 3, characterized in that, The first and second iron plates abut against the third and fourth bolt holes of the second flange, respectively.

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